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HSChapter 55
U.S. imports of acrylic & modacrylic staple fibers, carded or combed for spinning (HS 550630) totaled $7K in April 2026, traded with 2 countries.
Last updated: April 2026 dataAcrylic and modacrylic staple fibers processed through carding or combing are a primary upstream input for the apparel and home-textiles spinning industry, valued for their wool-like hand, dyeability, and bulk. The single US tariff line covering this heading is 5506300000, and imports are subject to Section 301 tariffs when sourced from China, making origin a key cost variable for yarn spinners. Modacrylic grades, used in flame-retardant applications such as protective workwear and wigs, are classified here alongside standard acrylic, so fiber type and end-use documentation matter at entry.
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Both acrylic and modacrylic fibers fall under HTS 5506300000 and are not separated at the 10-digit level in the US schedule, so the duty rate is the same regardless of which variant is imported. However, modacrylic fibers used in flame-retardant or specialty applications may require additional product documentation to support end-use claims or downstream textile certifications.
To fall under heading 5506, the fiber must have been carded, combed, or otherwise processed specifically to prepare it for spinning into yarn. Fibers that have not undergone these opening and alignment steps — such as crimped tow or loose fiber not yet processed — are classified under different headings in Chapter 55, so the processing stage must be clearly documented in commercial invoices and technical data sheets.
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Monthly import values over time